CORE_SEARCH_PACKAGE_MANAGE CORE Endpoint
  /rpc/core/?method=CORE_SEARCH_PACKAGE_MANAGE  
  Save the package / payload of an advanced search to be used with other methods, for eg ACTION_ICAL_SEARCH  
  Object: 334. Click here for more information.  
  PARAMETERS TYPE NOTES
  Package Text (Long!) Mandatory. Search package, ie.  the XML produced for an advanced search, or its JSON equivalent
  RETURN  
  id Numeric